General Knowledge : General Science QUESTIONS AND ANSWERS :: part2 : 76 to 80
Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2014 examinations :
76.Which of the following are the ingredients of gun metal ? |
| Iron, Tin |
| Copper, Tin |
| Iron, Brass, Tin |
| Iron, Zinc, Titanium |
77.In vulcanisation, natural rubber is heated with |
| Carbon |
| Sulphur |
| Silicon |
| Phosphorus |
78.The combustible material at the tip of a safety match stick is |
| sulphur |
| manganese dioxide |
| phosphorus |
| antimony sulphide |
79.Rubber is coagulated from latex by adding |
| hydrochloric acid |
| acetic acid |
| sulphuric acid |
| carbonic acid |
80.Which of the following elements is non-radioactive ? |
| Uranium |
| Thorium |
| Plutonium |
| Zirconium |
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